I have 72 "tiles" in a tif format and each tile is 30X30
>tile
class : RasterLayer
dimensions : 3600, 3600, 12960000 (nrow, ncol, ncell)
resolution : 0.008333333, 0.008333333 (x, y)
extent : 60, 90, 60, 90 (xmin, xmax, ymin, ymax)
coord. ref. : NA
values : C:/Users/steve/....
min value : 0
max value : 255
What I'd like to do is find the fastest way to bring all 72 tiles
into one big raster.
merge() seems like one good choice, where I would merge each tile
with a blank raster that would get
filled in incrementally by each tile
> world
class : RasterLayer
dimensions : 21600, 43200, 933120000 (nrow, ncol, ncell)
resolution : 0.008333333, 0.008333333 (x, y)
extent : -180, 180, -90, 90 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs +towgs84=0,0,0
values : none
world <- merge(tile, world)
and the repeat that for the remaining 71 tiles. I'm also think that
one could extract the values from the tile
and use setValues but that appears to hit the memory wall in
Windows. The other option
I suppose is to use writeValues() and create a big file from the tiles.
Am I missing any obvious options?
Steve